: "Air Glow," a theme used for general playback and de-emphasis testing.
: It is manufactured with extreme tolerances for flatness, eccentricity, and reflectivity to ensure it serves as a true "reference" for mechanical alignment. sony yeds18 test disc exclusive
The exclusivity of the YEDS-18 stems from its specialized manufacturing standards. Unlike standard consumer CDs, this disc was built to meet or exceed for physical characteristics that are impossible to replicate on home-burned CD-Rs: : "Air Glow," a theme used for general
: Since it was a service-only tool, it is no longer in production. Finding one in perfect condition is described by experts as "virtually impossible". Technical Purpose and Applications : "Air Glow
: A series of sine waves (e.g., 100Hz, 1kHz, 10kHz, 20kHz) at 0 dB for measuring output voltage, distortion, and channel separation.
